Mineralogy, Geology, &<. 51 
Fluor Spar in Tennessee.— Extract of a letter from H. Hi. 
Hayden, Esq. to the Editor. 
Baltimore, August 28th, 1821. 
This fluate of lime which I have sent you, was collected 
and brought to me by a young gentleman from Tennessee, 
who was graduated at our Medical University about two years 
since. He informed me that it was found in Smith Coun- 
ty, Tennessee, where it was abundant: that it was known 
to the inhabitants by no other name than the blossoms of 
lead, of which it was considered a manifest indication : that 
considerable excavations had been made in search of lead. 
in doing which, the fluate of lime was discovered in isolated 
masses of various sizes, which were broken up and thrown 
upon the surface. From these he gathered the specimens 
which I have. 
As to its geological situation, 1 have no means of ascer- 
taining at present; but believe it to be in the primitive 
range, and if I remember correctly, he informed me that it 
occurred on the side of the mountain, and near the road 
leading to the Atlantic States. 
Of this substance he brought me perhaps a dozen pieces, 
all of which are either whole or parts of cubes. The most 
predominant colour: is that of a beautiful violet or purple. 
Some of a yellow, and filled with brilliant pyrites. Among 
them is a specimen of two cubes united, (though mutilated,) 
having the angles accuminated, and such as is represented 
in the Abby Hauy’s work, plate 32d, fig. 87, and which 
he terms, “Chaux fluatee Bordee.” Of this locality 1 have 
not the smallest reason to doubt, being well acquainted with 
the gentleman ;* and moreover, I think the mineral the 
most interesting of the kind that I have yet seen from any 
part of the United States. 
Crystahized Gypsum.—We are indebted to William Lef- 
fingwell, Esq. for a very fine crystal from Ellsworth, Trum- 
bull County, Ohio. It is a very perfect rhomboidal crys- 
tal, or rather it is composed of two crystals united. It is 
* Dr. Mazee. 
